S
M
T
W
T
F
S
26
77°
57°
27
75°
58°
28
73°
57°
29
72°
57°
30
79°
58°
31
73°
55°
1
77°
57°
2
79°
54°
3
76°
51°
4
72°
50°
5
71°
57°
6
71°
55°
7
78°
54°
8
78°
49°
9
73°
51°
10
78°
57°
11
78°
48°
12
74°
49°
13
70°
58°
14
79°
58°
15
76°
50°
16
76°
48°
17
69°
48°
18
69°
47°
19
73°
49°
20
74°
48°
21
67°
49°
22
70°
54°
23
69°
55°
24
71°
51°
25
74°
46°
26
66°
44°
27
65°
45°
28
66°
45°
29
66°
48°
30
67°
53°
31
66°
55°
1
73°
54°
2
72°
48°
3
71°
44°
4
68°
50°
5
72°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fossambault-sur-le-Lac
Fossambault-sur-le-Lac's August 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 42° and 58°. The average high for August is 72° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fossambault-sur-le-Lac. See also: September | October | November.